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Edelbrock RPM Vs RPM AirGap

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#3 ·
I had an air gap a custom built 454. Motor dynoed at 450 hp and 475 ft lbs torque. Love it. I had a custom ground cam from Comp Cams too. Supposedly was strictly for marine use. I know it had awesome mid-range acceleration. I'll see if I can find the specs.
 
#4 ·
Keep the RPM AirGap IMO... As stated the runners are seperated by an open air space which can only help IAT in a closed engine compartment. It also has a dropped center divider in the plenum for better top end power. Looking at Edelbrock's website it shows the ports are a tiny tiny tiny bit bigger than the Performer RPM.

I'm running an RPM AirGap on my 385ci and its a great manifold. I'm spinning 5700rpms and it seems to be working well. Great lowend and midrange and instant power combined with the AFR 190cc port. I may be switching to a Vic Jr if it well help on the topend.

<a href="http://usera.imagecave.com/ryanootj/DSC00365.JPG"><img src="http://usera.imagecave.com/ryanootj/icth_DSC00365.JPG.jpg"></a>
 
#5 ·
believe it or not, I'm getting great power out of my ($100) torker 2... it is what the engine builder recommended... he said that accordning to his dyno it would make as much horsepower on my 383 (385) as anyything else.
 
Discussion starter · #6 ·
I would look into that intake, but they dont make it for vortec heads.

I just bought my bolts today. I bought some ARP intake bolts, but I've read on here that the best ones are accually the GM ones since they have a ball tip and bottom out so you cant over tighten them. So back they went and I got the GM ones.
 
Discussion starter · #7 ·
Ryan00TJ said:

I'm running an RPM AirGap on my 385ci and its a great manifold. I'm spinning 5700rpms and it seems to be working well. Great lowend and midrange and instant power combined with the AFR 190cc port. I may be switching to a Vic Jr if it well help on the topend.

Click to expand...
Theres an article out there with a shootout between the Victor and Airgap on a 383 motor 200 Brodix Heads and 2 differant healthy solid rollers. With the smaller Roller it was almost identical power (Peak) Victor had it by a few ponies but the RPM was all over the Victor everywhere else. On the bigger cam the victor made like 9 more HP around 6K vs the RPM. The magazine said the Air Gap was a hands down winner, unless you were pushing some real huge sbc cubic inches and a huge cam.
 
#8 · (Edited)
As always...be careful believing anything 100%....especially if I'm involved. :D :laugher:

Case in point: GM's single plain Vortec intake kicks some serious *** where you'd think or be led to believe an Air Gap RPM would own it.

How come very little tests use the GM Bowtie (single plane aluminums) intakes ????Oh, that's right.....they don't start with Eddie. :laugher:

Just the same as vac sec vs mech sec carbs. Oh crap....did I just bring up something else. Okay...here it goes. I've seen DP carbs kick *** where the dyno and mathmatics would show otherwise. Okay...shhhhhh. :laugher:

wtfo said:
believe it or not, I'm getting great power out of my ($100) torker 2... it is what the engine builder recommended... he said that accordning to his dyno it would make as much horsepower on my 383 (385) as anyything else.
Click to expand...
In a Corvette, and this is the only reason they where made to begin with...think hood height, but other than that almost everytime it isn't, unless compared to others like it such as the Weiand Excelerators and such.

They do very well on a flowbench though, but that's not important compared to actual running.
 
#10 ·
Sorry I was a little cryptic earlier... The point I intended to make is along the lines of don't believe everything you hear / read... I would have thought a torker would be a dog... but apparently it makes just as much peak horsepower as any of the other mainstream manifolds on a 383... I was also surprised that it has absolutely no problem with low end... idles down to 600 easily and pulls like a train from right off idle...

You'll probably be pretty close on either of the manifolds you've got on hand.
 
#12 ·
Cookin -
"One change at a time."

You need to get your boat baselined first. IE: try it with normal Bravo lower.

Your rpms jumped way up, but speed didn't. The fact your rpms jumped way up means your motor is now making power again from getting the needed fuel.

A intake change, carb change, or whatever engine related will not change your slip #'s.

Slip is related to the outdrive and anything bolted to it.

=======

Just trying to keep you focused. :D

BTW: I'd probably crap myself if an RPM worked better than a Vic JR on your motor above 5k.
 
#14 · (Edited)
Oh I am focused.I know I need more dia. in my prop.Thinking of acceleration not top speed with the intake.I don't think top speed would be effected.I am going to try a bravo 24 pitch w/15 3/4 dia. and a Rev4 25 p with 14 5/8 dia.The foot doesn't work right until 80+ mph.There is no cavitation with it so the x isn't too small.Biggest problem is idling.I am changing the advance curve to where I originally asked it too be.The Dyno guy hunted #'s and it is setup more for a car.A friend Going to set the carb up with a vacuum gage check fuel pressure and re curve the dist.
 
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